Annual report pursuant to Section 13 and 15(d)

VARIABLE INTEREST ENTITIES AND EQUITY INVESTMENTS AND ADVANCES Aeroleo Narrative (Details)

v3.7.0.1
VARIABLE INTEREST ENTITIES AND EQUITY INVESTMENTS AND ADVANCES Aeroleo Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Oct. 01, 2015
Jul. 01, 2011
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Sep. 30, 2015
Dec. 31, 2013
Schedule of Equity Method Investments [Line Items]              
Investments in and advances to equity investees     $ 0 $ 36 $ 125    
Deferred revenue       0 31,047   $ 24,243
Assets     955,173 1,004,351      
Liabilities     482,535 528,244      
Aeroleo              
Schedule of Equity Method Investments [Line Items]              
Ownership   50.00%          
Voting ownership percentage   20.00%          
Investments in and advances to equity investees   $ 4,800          
Aeroleo | Equity Method Investee              
Schedule of Equity Method Investments [Line Items]              
Notes receivable to related party   $ 6,000          
Notes receivable interest rate   6.00%          
Revenue from related parties       21,400 $ 16,700    
Aeroleo | Co-venturer              
Schedule of Equity Method Investments [Line Items]              
Holding period for put/call arrangement (in years) 2 years            
Variable Interest Entity, Not Primary Beneficiary | Aeroleo              
Schedule of Equity Method Investments [Line Items]              
Percent of economic interest 50.00%            
Percent of voting interest 80.00%            
Aeroleo | Aeroleo | Equity Method Investee              
Schedule of Equity Method Investments [Line Items]              
Deferred revenue           $ 42,100  
Aeroleo              
Schedule of Equity Method Investments [Line Items]              
Assets     12,900 17,900      
Liabilities     $ 9,200 $ 15,900